Stopping device for talking machines



:1 11934. e. F. CLARK STOPPING DEVICE FOR TALKING MACHINES May 1 Filed June 24. 1950 6 Sheets-Sheet l fittormey May 1, 193 GP. CLARK STOPPING DEVICE FOR TALKING MACHINES Filed June 24, 1930 6 Sheets-Sheet 2 w a w h w [attorney May It, 1%34. G. F. CLARK STOPPING DEVICE FOR TALKING MACHINES Filed June 24. 1950 6 Sheets-Sheet 3 nuerztor fittorney May 1, 19340 G. F. CLARK STOPPING DEVICE FOR TALKING MACHINES Filed June 24, 1930 6 Sheets-Sheet 4 Inventor May 1, 119343 e. F. CLARK 11,956,708

STOPPING DEVICE FOR TALKING MACHINES Filed June 24, 1930 6 Sheets-Sheet 5 May El, 134. G. F. CLARK STOPPING DEVICE FOR TALKING MACHINES Filed June 24. 1930 6 Sheets-Sheet 6 ttorneu iatented May 1, 1934 TAT rice

STOPPING DEVICE FOR TALKING MACHINES George Frederick Clark West Drayton, England,

assignor to Victor Talking Machine Company,

a corporation of New Jersey 18 Claims.

This invention relates to improvements in stopping devices for talking machines and in particular to stoppin devices of the kind which include a member in frictional engagement with a rotating part of the machine and rotating therewith during playing of the machine and a stop adapted to be inserted at the required moment and through means moving in conjunction with the sound arm, in the path of said member to arrest its rotation, whereupon the machine is brought to a standstill through the frictional engagement between the arrested member and the rotating part. An example of such a stopping device is described in our earlier British Patent No. 335,553.

The obj ct of the present invention is to provide a stopping device of the kind indicated above, which, in addition to being automatically operated to stop the machine when the playing of a 20 record is completed, is also operable by movement the sound arm to hold the turntable and other rotating parts of the machine positively against mo ement when the machine is not in use, or if d ired d1 ing the changing of records.

The pre t invention accordingly consists in a stopping device of the kind referred to above in which means are provided operable by the sound arm to move the stop into the path of the memirictional engagement with a rotating part the machine when the playing of a record is onpie and also when the sound arm is swung irection as that in which it moves during playing.

in an alternative arrangement the stop memoer is moved into the stopping position when the playing of a record is completed and also when sound arm is swung beyond a given point in the opposite direction to that in which it moves during playing.

Several embodiments of the invention are illustrated as examples in the accompanying drawings as applied to the stopping device described in our earlier British Patent No. 335,558.

In the drawings, Figs. 1, 2 and 3 illustrate an embodiment of the invention in which the sound arm is swun beyond the edge of the turntable in the same direction as that in which it moves during playing, to eiiect the secondary operation of the stop member. The various figures illustrate the parts in different positions.

Fig. 4 is a view of a diiierent construction in which the secondary stopping operation is effected by a movement of the sound arm in the same direction as in Figs. 1, 2 and 3.

Figs. 5 and 6 are views of an alternative construction in which the secondary operation of the stopping device is effected by a swinging movement of the sound arm in the opposite direction to that in which it moves during playing.

The form of stop mechanism illustrated is in all 60 cases of the kind described in our earlier British Patent No. 335,558 which is operable to stop the machine when the playing of a record is completed by a reversal of the direction of movement of the sound arm through the entry of the stylus in an eccentric groove provided at the centre of the record.

Referring to the drawings, a baseplate 1 is fixed to the motor board of the machine in a position beneath the turntable 2 and upon this baseplate a lever 3 is pivoted intermediate its length on a pivot pin 4.

This lever 3 at one end is coupled with means moving with the sound arm 5, while the other end of the lever carries a roller or stud 6. Upon the same pivot 4' is rotatably mounted a second lever '7, this second lever being held in frictional engagement with lever B by means of a spring Washer 8 mounted between the upper surface of lever 7 and the head 9 of the pivot pin 4. The free end of lever '7 is slotted as at 10 and the slot engages with a vertically upstanding pin 11 carried on a stop lever 12 pivoted on a pin 13 carried by the baseplate 1. A fixed pin 33 on the baseplate 1 engages in an enlarged aperture 34 in lever 12 (Figs. 1, 2 and 3) to limit the movements of the lever 12 about its pivot.

The stop lever 12 comprises two arms 14, 15, the arm 14 having a cam surface 44 on its edge which eo-operates with the roller or stud 6 on lever 3.

The other arm 15 of the stop lever 12 is provided with a shaped end 18 which, as lever 12 is moved as permitted by the fixed pin 33 in the enlarged aperture 34 in lever 12 (Figs. 1, 2 and 3) moves into and out of the path of any one of a number of projections 19 which extend substantially radially from a sleeve 20 carried upon the usual central boss 21 on the underside of the turntable. The inner surface of the sleeve 20 is in frictional engagement with a number of friction pads 22 carried in known manner in apertures in the walls of the boss 21, said friction pads 22 being urged outwardly by means of a spring ring 23 contained within the boss 21 to make firm frictional contact with the inner surface of the sleeve 20.

During playing of the machine the stop lever 12 occupies the position against the pin 33 by means of the aperture 3 1 (Fig. 1) where its end 18 is out of the path of the projections 19 and is held in that position by the frictional engagement between the lever and the sound arm driven lever 3 which is moved continuously during playing in a counter-clockwise direction about its pivot 4. It will be understood however, that slip takes place in one direction during playing between members 3 for while lever 3 is constrained to move continuously with the sound arm 5, lever 7 is held stationary through its pin and slot connection it, 11 with the stop lever 12.

When the playing of a record is completed, the needle enters the eccentric groove as provided at the end of the record and a reversal of the direction of movement of the sound arm takes place in known manner, whereupon the lever 3 is moved clockwise together 'ith lever Z to move stop lever 12 to bring the upper side of aperture 34 into contact with pin 33. In this position of stop lever 12, the end 18 of arm 15 lies in the path of one of the radial projections 19 on the sleeve 20, so that rotation of the sleeve 20 ceases and the turntable is brought to a standstill by friction between the sleeve 20 and the studs 22 carried by the turntable boss 21.

When the machine is to be restarted the sound arm 5 is moved outwards by hand, to bring the stylus over the point of commencement of a record, and the lever 3 is again moved clockwise so that the roller or stud 5 on lever 3 moves along the cam 44 on the edge or" arm 14 of stop lever 12 and lever 12 is caused to return to the nonstopping position, end 13 moving out of the path of projections 19 and the turntable commencing to rotate.

During this movement of the sound arm 5 the lever 7 is caused to move about pivot to a limited extent against friction and in the opposite direction to the lever 3 by virtue of its pin and slot connection l0, 11 with the stop lever 12.

In accordance with the present invention means are provided whereby in addition to being operated automatically when the end of a record is reached, the stop device may also be actuated to stop the rotation of the turntable by swinging the sound arm to a position where the stylus is outside the edge of the turntable, the sound arm 5 in some cases being moved in the same direction as that in which it moves during playing and sometimes in the opposite direction.

In the case illustrated in Figs. 1, 2 and 3, the lever 3 is connected indirectly with the sound arm 5 through a link 25 pivotally connected at one end to the arm 3 and at the other end to 2. lug 26 on a bracket 2'? screwed to a flange 2S rotatable with the sound arm. The lever 3 is also furnished with an arm 29 arranged at an angle to the part carrying roller 6, and this arm 29 itself carries a roller 30. The stop lever 12 is formed with a second cam surface 31 with which the roller so co-operates.

Fig. 1 shows the parts in the positions they occupy just after reproduction from a record has commenced, the stop 1e er 12 being in the position where the end 18 is out of the path of the projections 19.

Fig. 2 illustrates the parts in the positions they occupy when the playing of the record has been completed, the stylus having entered the eccentric groove 2a and the end 18 having moved into the path of a projection 19 to stop the machine. If now the sound arm 5 is returned to the position indicated in Fig. 1, lever 3 is moved clockwise and roller 6 co-operates with the cam 1 1 on part 14 of lever 12 to move the latter to the non-stopping position and playing of a record can proceed.

If however, playing is to be discontinued, the sound arm is swung into the position indicated in Fig. 3. As this movement commences the arm 3 moves counter-clockwise and takes wit it lever '7 so that stop lever 12 is rocked into the non-stopping position. As movement of the sound arm 5 is continued the roller 30 on part 29 of lever 3 co-operates with the cam surface 31 and stop lever 12 is again rocked into the stopping position and is positively retained in that position by the engagement of the roller 30 with the cam 31, until the sound arm is again swung in a counter-clockwise direction.

In the construction illustrated in Figs. 2 and 3 the stop lever 12 is formed in two parts 12 and 12', both mounted for rotation about pivot 13 and connected together by a spring 32 which is maintained under tension by the engagement of part 12 with a stop 35 on part 12'. By this arrangement it is ensured that l ver 3 can be moved counter-clockwise to cause roller 30 to move over cam 31 even though end 18 should first contact with the outside of a projection 19. In such CllClll .stances spring 32 would be momentarily stretched, the part 12 being afterwards rocked thereby into the full stopping position as soon as the projection 19 in question had moved clear.

In the arrangement according to Fig. an arm 36 is fixed rigidly to the sound arm 5 in a position where it extends radially from the sound arm axis. The end of the arm 36 is connected to one end of lever 3 through a link 3'? having a hook-shaped extension 38. For the purpose of stopping the machine at the completion of the playing of a record and the re-star ing of the machine, this embodiment operates in the same manner as the arrangement described above. When the machine is not required for further use, the sound arm 5 is swung into the position shown, by a movement in the same direction as that in which it moves during playing. As the sound arm is thus moved the arm 3 is first moved counter-clockwise, the arm 6 and lint: 37 passing through the position indicated at A, and lev being moved to the nonstopping posit the extension 15 thereof in abutment wit.. 1'? (Figs. of the invention embodying the stop lugs 16 and 1'7 in place of the pin 33 and aperture 34 illustrated in Figs. 1, 2, and 3). W'hen 36 and link 3'7 reach the position indicated at direction of rotation of arm 3 is reversed through arm 35 and link 3'! passing over a dead centre and further movement of the sound arm 5 results in the lever 12 again being moved to the stopping position. The that shown in full lines and the slot in the hook 38 engages a fixed pin 39 on the lever 12. The path of movement of the hook 38 is such that the pin 39 is held against movement through wi th the slot in the hook operating as a cam and lever 12 is thus retained in the stopping position until such time as a return movement of sound arm 5 is effected.

In the arrangement illustrated in Figs. 5 and 6, the secondary operation of the stopping mechanism into the stopping position is effected by a movement of the sound arm or" given extent in a direction which is the reverse or" that in which it moves during playing. In this case also the lever 3 is connected through a link 40 with an arm link 3'7 moves from position B to 4, 5, and 6 illustrating a modification B, the

41 fixed to the sound arm 5. The stop lever 12 in this case is formed With two cam surfaces 42, 43 on its edge which cam surfaces form in effect a single continuous cam surface.

Fig. 5 illustrates the parts in the positions they occupy during playing of the machine. Playing of a record having been completed, the stylus enters the eccentric groove 24 and the machine is brought to a standstill in the manner described above. To restart the machine the sound arm 5 is swung outwards to a position Where the stylus is in the region of the point of commencement of a record. During this movement the lever 3 is moved clockwise and the roller 6 co-operates with cam surface 42 on lever 12 to move that lever to the non-stopping position. If however, the machine is not required for further use, the sound a m 5 is moved into the position indicated in Fig. 6, whereupon roller 6 engages cam surface i3 to return the lever 12 to the stopping position and the lever 12 is retained in that position until such time as the sound arm is again swung in- Wards to a sufficient distance to disengage roller 6 from cam 42.

I claim:

1. In phonograph mechanism, a turntable, a brake for said turntable, a pivoted tone arm adapted for movement completely across said turntable, means actuated by said tone arm upon a reverse movement thereof at a point adjacent the center of said turntable during its normal direction of movement for causing said brake to be applied, and means actuated by said tone arm for maintaining said brake in applied position upon movement of said tone arm in said normal direction of movement to a point adjacent the edge of turntable.

2. In phonograph mechanism, a turntable, a brake for said turntable, a pivoted tone arm adapted for movement completely across said turntable, means actuated by said tone arm upon a reverse movement thereof adjacent the center of said turntable for causing said brake to be applied, and means actuated by said tone arm for maintaining said brake in applied position upon movement of said tone arm beyond the edge of said turntable and for releasing said brake upon movement of said tone arm to a position substantially diametrically opposite to that of said brake applying position.

3. In a phonograph, a turntable, a brake for said turntable, a tone arm pivotally supported for movement completely across said turntable, means actuated by said tone arm at a point in its path of travel across said turntable in one direction for causing the application of said brake, means also actuated by said tone arm during the continued movement thereof along said path for retaining said brake in applied position, and means actuated by a reverse movement of said tone arm for causing the release of said brake from said turntable.

4. In a phonograph, a turntable, a brake for said turntable, a tone arm pivotally supported for movement completely across said turntable, means actuated by said tone arm at a point intermediate the extremities of its path of travel for causing the application of said brake, means also actuated by said tone arm during the continued movement thereof in the same direction along said path for retaining said brake in applied position, and means actuated by a reverse movement of said tone arm for causing the release of said brake.

5. In a phonograph, a turntable, a brake for said turntable, a tone arm pivotally supported for movement completely across said turntable, means actuated by said tone arm upon a reverse movement thereof at a point adjacent the center of said turntable during its normal direction of movement for causing said brake to be applied, and cam means controlled by said tone arm upon movement thereof completely across said turntable for maintaining said brake in applied position.

6. In a phonograph, a turntable, a friction brake for said turntable, a tone arm pivotally supported for movement completely across said turntable, means actuated by said tone arm at points intermediate the extremities of its path of movement for causing the application of said brake, and cam means controlled by said tone arm upon movement thereof completely across said turntable for maintaining said brake in applied position.

7. In a phonograph, a turntable, a friction brake for said turntable, a tone arm pivotally supported for movement completely across said turntable, means actuated by said tone arm upon a limited reverse movement thereof at a point intermediate the extremities of its path of movement for causing the application of said brake, cam means controlled by said tone arm upon movement thereof completely across said turntable for maintaining said brake in applied position, and additional cam means actuated by a complete return movement of said tone arm across said turntable for releasing said brake.

8. In a phonograph, a turntable, a friction brake carried by said turntable and rotatable therewith, a tone arm pivotally supported for movement completely across said turntable, a stop lever actuated by said tone arm at a point intermediate the extremities of its path of movement for engaging said friction brake to stop said turntable, a cam plate co-operatively associated with said stop lever and adapted to be actuated by said tone arm upon movement thereof completely across said turntable for maintaining said lever in brake engaging position, said cam plate being also operable upon a reverse movement of said tone arm completely across said turntable fo moving said stop lever out of engagement with said brake to release said turntable.

9. In a phonograph, a turntable, brake means carried by and rotatable with said turn able, a tone arm pivotally supported for move: ut completely across said turntable, brake control means comprismg a base plate, a cam plate pivoted on said base plate, means for limiting the movement of said cam plate, a stop lever pivotally mounted on said cam plate and adapted to engage said brake upon movement of said cam plate in one direction, lever means pivoted to said base plate and adapted to control said cam plate, means connecting said tone arm and lever means, means frictionally mounted on said lever means for actuating said cam plate in response to a reverse movement of said tone arm at a point interme diate the extremities of its path of movement to move said step lever into the path of said brake, and means carried by said lever co-operating with said cam plate for retaining said stop lever in engagement with said brake in one extreme position of said tone arm and withdrawing said stop lever therefrom in the other extreme position of said tone arm.

10. In a phonograph, a turntable, a friction brake for said turntable, a tone arm pivotally supported for movement completely across said loo turntable, means actuated by said tone arm upon a limited reverse movement thereof at a point intermediate the extremities of its path of movement for causing the application of said brake, cammeans controlledbysaid tone arm upon movement thereof completely across said turntable for maintaining said brake in applied position, said cam means being also effective upon a complete reverse movement of said tone arrn across said turntable to release said brake.

11. In a phonograph, a turntable, a friction brake for said turntable, a tone arm pivotally supported for swinging movement completely across said turntable, means actuated by said tone arm at a point intermediate the extremities of its path of movement for causing the application of said brake during the movement of said tone arm in one direction, and cam means controlled by said tone arm upon further movement thereof in the same direction for maintaining brake in applied position and for releasing said brake upon movement of said tone arm completely across said turntable in the opposite direction.

12. In a phonograph, the combination of a movable element capable of forward and reverse movements, a rotatable element, a brake member carried by and rotatable with said rotatable element, and means associated with said movable element adapted to engage said brake member upon a limited reverse movement of said movable element and to release said brake member upon further movement of said movable element in the same direction.

13. In a phonograph, the combination of a movable element capable of forward and reverse movements, a rotatable element, a brake member carried by and rotatable with said rotatable element, and means associated with said movable element adapted to be moved into the path of said brake member upon movement of said movable element in one di ection and to be moved out of the path of said brake member upon further movement of said movable element in the same direction.

14. in a phonograph, the combination of a. movable element capable of forward and reverse movements, a r tatable element, a brake member carried by and rotatable with said rotatable elemerit, and means associated. with said movable element adapted to be moved into the path of said brake member upon movement of said movable element in o e direction and to be maintained in the path of said brake member upon movement of said movable element in the opposite direction.

15. .n a phonograph, the combination of a movable element capable of forward and reverse movements, a rotatable element, a brake element carried by and rotatable with said rotatable element, and brake engaging means adapted to be moved into the path of said brake member upon movement of said movable element in a direction opposite to that in Which it travels during a period of sound reproduction and to be moved out of the path of said brake member upon further movement of said movable element in said opposite direction.

16. In a phonograph, the combination of a rotatable record support, an automatic brake for said support comprising a rotatable brake member carried by and rotatable with said support, means adapted to be moved into the path of said brake member to arrest rotation thereof, a sound translating device, means actuated by and in conjunction With said device for moving said first named means into the path of said brake member upon movement of said device in one direction, and means actuated by said device upon movement of said device in the opposite direction for maintaining said first named means in the path of said brake member.

17. In a phonograph, the combination of a rotatable record support, an automatic brake for support comprising a rotatable brake mem- -er carried by and rotatable with said support, neans adapted to be moved into the path of said brake mem. er to arrest rotation thereof, a sound translating device, means actuated by and in conjunction with said device for moving said first-named means into the path of said brake member upon movement of said device in one direction, and means actuated by said device upon further movement thereof in the same direction for movement of said first-named means out of the path of said brake member.

18. In a phonograph, the combination of an automatic brake comprising a rotatable brake member and a stop member adapted to engage brake member to stop rotation thereof and to be moved to permit rotation of said member, a sound translating device, a member movable by moving said device in one direcion to permit rotation of said stop member, and means adapted to co-operate with said stop member and the member movable by said device whereby movement of said stop member to non-stopping position will be effected upon movement of said device in a direction opposite to that causing said brake member to stop.

GEORGE FREDERICK CLARK. 

